PipeStream.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / ManagedLibraries / Remoting / Channels / IPC / PipeStream.cs / 1305376 / PipeStream.cs

                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
//==========================================================================
//  File:       PipeStream.cs 
// 
//  Summary:    Stream used for reading from a named pipe
//  Author:     [....]@microsoft.com 
//=========================================================================

using System;
using System.IO; 
using System.Runtime.Remoting;
 
namespace System.Runtime.Remoting.Channels.Ipc 
{
 
    // Basically the same as NetworkStream, but adds support for timeouts.
    internal sealed class  PipeStream : Stream
    {
        private IpcPort _port; 
        private int    _timeout = 0; // throw timout exception if a read takes longer than this many milliseconds
 
 
        public PipeStream(IpcPort port)
        { 
            if (port == null)
                throw new ArgumentNullException("port");

            _port = port; 
        } // SocketStream
 
        // Stream implementation 
        public override bool CanRead { get { return true; } }
        public override bool CanSeek { get { return false; } } 
        public override bool CanWrite { get { return true; } }

        public override long Length { get { throw new NotSupportedException(); } }
 
        public override long Position
        { 
            get { throw new NotSupportedException(); } 
            set { throw new NotSupportedException(); }
        } // Position 

        public override long Seek(long offset, SeekOrigin origin)
        {
            throw new NotSupportedException(); 
        }
 
        public override int Read(byte[] buffer, int offset, int size) 
        {
            if (_timeout <= 0) 
            {
                return _port.Read(buffer, offset, size);
            }
            else 
            {
                IAsyncResult ar = _port.BeginRead(buffer, offset, size, null, null); 
                if (_timeout>0 && !ar.IsCompleted) 
                {
                    ar.AsyncWaitHandle.WaitOne(_timeout, false); 
                    if (!ar.IsCompleted)
                        throw new RemotingTimeoutException();

                } 
                return _port.EndRead(ar);
            } 
        } // Read 

        public override void Write(byte[] buffer, int offset, int count) 
        {
            _port.Write(buffer, offset, count);
        } // Write
 
        protected override void Dispose(bool disposing)
        { 
            try { 
                if (disposing)
                    _port.Dispose(); 
            }
            finally {
                base.Dispose(disposing);
            } 
        }
 
        public override void Flush() { } 

 
        public override IAsyncResult BeginRead(
            byte[] buffer,
            int offset,
            int size, 
            AsyncCallback callback,
            Object state) 
        { 
            IAsyncResult asyncResult =
                _port.BeginRead( 
                    buffer,
                    offset,
                    size,
                    callback, 
                    state);
 
            return asyncResult; 
        } // BeginRead
 

        public override int EndRead(IAsyncResult asyncResult)
        {
            return _port.EndRead(asyncResult); 
        } // EndRead
 
 
        public override IAsyncResult BeginWrite(
            byte[] buffer, 
            int offset,
            int size,
            AsyncCallback callback,
            Object state) 
        {
            throw new NotSupportedException(); 
        } // BeginWrite 

 
        public override void EndWrite(IAsyncResult asyncResult)
        {
            throw new NotSupportedException();
        } // EndWrite 

 
        public override void SetLength(long value) { throw new NotSupportedException(); } 

    } // class SocketStream 

} // namespace System.Runtime.Remoting.Channels

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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